Average Co-Inventor Count = 2.25
ph-index = 2
The patent ph-index is calculated by counting the number of publications for which an author has been cited by other authors at least that same number of times.
Company Filing History:
1. Minnesota Mining and Manufacturing Company (2 from 7,865 patents)
2. 3m Innovative Properties Company (1 from 14,076 patents)
3 patents:
1. 5945640 - Stethoscope chestpiece having two suspended diaphragms
2. 5824968 - Ear tips having a plurality of ear contacting surfaces
3. D381366 - Identification tag